JPH0373693A - Deflection york device - Google Patents

Abstract

PURPOSE:To easily and quickly adjust the balance of a fine correction value of misconvergence on the upper and lower parts of the screen of a cathode ray tube(CRT) by connecting at least one side out of both the end sides of a variable resistor and the sliding terminal side to a field control(FC) coil through a resistor. CONSTITUTION:One end side of the variable resistor 3 is connected to the high voltage side of the FC coil through a resistor 5a and the other end side is connected to the low voltage side of the FC coil through a resistor 5b. Since the resistors 5a, 5b are connected to both the sides of the variable resistor 3, the resistor 5a acts as a protection resistor when the sliding terminal 4 of the resistor 3 is moved to one end side a of the resistor 3. Thereby, the 1st coil 1 is not short-circuited, so that the whole voltage is not impressed to the 2nd coil 2. Since the resistors 5a, 5b are connected, a balance change in the capacity of currents flowing into the 1st and 2nd coils 1, 2 is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a deflection yoke device equipped with an FC (Field CorLroll) coil.

[Conventional technology]

As is well known, the deflection yoke used in color television receivers and color display devices consists of a horizontal deflection coil and a vertical deflection coil attached to a bobbin. In the position of
Those equipped with an FC coil are widely used. This F
As shown in Fig. 4, the C coil has a first coil 1 and a second coil 2 connected in series, and the high voltage side terminal of the first coil l is connected to the vertical deflection coil ( A variable resistor 3 is connected between both ends of this FC coil, and a sliding terminal of this variable resistor 3 is connected to the first coil 1 and the second coil. 2, that is, the connection between both coils 1 and 2.

Therefore, by adjusting the sliding position of the sliding terminal 4 of this variable resistor 3, the first coil 1, which affects the upper side of the screen of the cathode ray tube, and the lower side of the screen of the cathode ray tube, for example, can be adjusted. It becomes possible to adjust the balance between the amount of current flowing through the second coil 2 and the current flowing through the second coil 2. In this way the first
By adjusting the balance of the amount of current flowing through the coil 1 and the second coil 2, the horizontal direction of the blue B beam and red R beam on the screen of the cathode ray tube can be adjusted as shown in FIG. Due to the shift in It is now possible to adjust the balance between the top and bottom of the screen of Misconvergence Yv, and it is possible to adjust the balance between the top and bottom of the screen of Misconvergence Yv.
By providing the correction coils, it becomes possible to easily correct these ξsconvergence Y, Yv.

[Problem to be solved by the invention]

However, in the circuit shown in FIG.
In order to change the balance between the magnitude of the current flowing through the second coil 2 and the second coil 2, when the sliding terminal 4 of the variable resistor 3 is moved to both end positions a and b, for example, the tip of the sliding terminal 4 is moved to a When it moves to the position, the first coil 1 becomes short-circuited and the full voltage is applied to the second coil 2, so compared to when the tip of the sliding terminal 4 is at the approximately intermediate position C between ab and
There is a problem in that a large amount of current flows through the variable resistor 3, causing problems in the withstand voltage and heat generation of the variable resistor 3.

Furthermore, in the circuit shown in FIG. 4, when the sliding terminal 4 is moved, the change in the current balance flowing through the first coil 1 and the second coil 2 becomes very large.
In other words, delicate balance adjustment of the current capacity flowing through the
There was a problem in that it became extremely difficult to balance the delicate amount of correction for vertical misconvergence on the cathode ray tube screen, and it also took time.

The present invention has been made in order to solve the above-mentioned conventional problems, and its purpose is to avoid problems with the withstand voltage and heat generation of the variable resistor, and to solve the problem of the first coil and the second coil of the FC coil. An object of the present invention is to provide a deflection yoke device that can easily adjust the delicate balance between the coil and the current capacity flowing through the coil.

[Means to solve the problem]

In order to achieve the above object, the present invention is configured as follows. That is, the present invention provides an FC (Field Control) consisting of a series connection body of a first coil and a second coil arranged above and below or on the left and right sides of a deflection yoke.
l) A coil, and a sliding terminal connected between both ends of the FC coil and connected between the first coil and the second coil to determine the amount of current flowing in the first coil and the amount of current flowing in the second coil. In a deflection yoke device that includes a variable resistor that adjusts the balance with the amount of current flowing, at least one side of both ends of the variable resistor and the sliding terminal side is connected to F through a resistor.
The structure is characterized in that it is connected to the C coil.

[Effect]

In the present invention, an FC coil consisting of a series connection of a first coil and a second coil is connected to a variable resistor via a resistor. Therefore, even if the sliding terminals of the variable resistor are moved to both ends of the variable resistor, the first
The coil on one side of the coil and the second coil are short-circuited, and the full voltage is not applied to the coil on the other side. Therefore, a large amount of current does not flow through the variable resistor, and problems with the withstand voltage and heat generation of the variable resistor do not occur.

In addition, by interposing a resistor between the FC coil and the variable resistor, when the sliding terminal of the variable resistor is moved,
This prevents the balance of the current capacity flowing through the first coil and the second coil from changing significantly, and thereby allows delicate adjustment of the current capacity flowing through the first coil and the second coil. becomes.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. In the following description of the embodiment, the same parts as those of the conventional example are denoted by the same reference numerals, and redundant explanation thereof will be omitted.

FIG. 1 shows a circuit configuration of a first embodiment of a deflection yoke device according to the present invention. A characteristic feature of this embodiment is that a resistor as a resistor is connected to both ends of the variable resistor 3, and one end of the variable resistor 3 is connected to the high voltage side of the FC coil via a resistor 5a. The other end is connected to the low voltage side of the FC coil via a resistor 5b. In this way, by connecting the resistors 5a and 5b on both sides of the variable resistor 3, for example, when the sliding terminal 4 of the variable resistor 3 is moved to the one end side a of the variable resistor 3, the resistor By 5a acting as a protective resistance,
The first coil 1 is never short-circuited and therefore the entire voltage is not applied to the second coil 2.Similarly, the sliding terminal 4 is connected to the other end of the variable resistor 3. Even when moving, the second coil 2 will not be short-circuited due to the presence of the resistor 5b as a protective resistor, and the entire voltage will not be applied to the first coil 1 side. In this way, when the sliding terminal 4 is moved, the first coil 1 or the second coil 2 will not be short-circuited, so a large amount of current will not flow through the variable resistor 3, and this can be avoided. Therefore, the withstand voltage and heat generation of the variable resistor 3 do not become a problem.

Furthermore, by providing the resistors 5a and 5b, it is possible to reduce the balance change in the current capacity flowing through the first coil l and the second coil 2 when the sliding terminal 4 moves. , the delicate balance adjustment of the current flowing through both coils 1.2 can be easily and quickly performed, and the misconvergence YN between the top and bottom of the screen of the cathode i-tube can be adjusted.

It is possible to balance the delicate correction amount of Yv.

Furthermore, by providing the resistors 5a and 5b, in the characteristic diagram of FIG. However, as in this embodiment, there is a problem that the correction amount changes greatly in response to a minute change in the volume rotation angle at the positions a and b at both ends of the volume rotation angle.
By providing the resistors 5a and 5b, it is possible to change the correction amount linearly with respect to the volume rotation angle over the entire section of the variable resistor 3, and to make the correction amount with respect to the volume variable amount in an ideal relationship. I can do it.

FIG. 2 shows the circuit configuration of a second embodiment of the deflection yoke according to the present invention. This second embodiment differs from the first embodiment in that a resistor 5 as a resistor is provided on the sliding terminal 4 side of the variable resistor 3. This second
Also in the case of the embodiment, the sliding terminal 4 is connected to the variable resistor 3.
When the variable resistor 3 is moved to both ends a and b, the presence of the resistor 5 that acts as a protective resistor prevents the first coil 1 or the second coil 2 from becoming short-circuited, and the withstand voltage of the variable resistor 3 increases. In addition, the relationship between the polyneum rotation angle of the variable resistor 3 and the correction amount can be made into a proportional relationship as shown in FIG. As in the case of the embodiment, delicate balance adjustment of the current capacity flowing through the first coil 1 and the second coil 2 (balance adjustment of the correction amount at the top and bottom of the screen) can be easily and quickly performed. It becomes possible to do so. Furthermore, in the circuit shown in Fig. 2, the variable range of the current flowing through the coils L and 2 can be adjusted by changing the resistance value of the resistor 5, thereby balancing the misconvergence correction amount between the upper and lower portions of the cathode ray tube. Can be adjusted optimally.

The present invention is characterized by a circuit configuration of an FC coil provided with a variable resistor, and the first coil and second coil 2 of this FC coil are attached at different positions, for example, at the neck part of the deflection yoke. The configuration of the deflection yoke, such as whether to install it on the left and right or the top and bottom, and whether the horizontal and vertical deflection coils are saddle-shaped or toroidal-wound coils. is not limited and is arbitrary.

〔Effect of the invention〕

In the present invention, since the variable resistor and the FC coil are connected through the resistor, even when the sliding terminal of the variable resistor is moved to the maximum or minimum position, the F
One of the first and second coils that make up the C coil will be short-circuited, and the full voltage will not be applied to the other coil, so a large amount of current will flow through the variable resistor. Therefore, the problems of voltage resistance and heat generation of conventional variable resistors can be effectively solved.

Also, when the sliding terminal of the variable resistor is moved, the FC
The balance of the current capacity flowing through the first coil and the second coil does not change significantly, and this allows for delicate balance adjustment of the current capacity flowing between the first coil and the second coil. In other words, delicate balance adjustment of the correction amount for misconvergence between the upper and lower portions of the screen of the cathode ray tube can be easily and quickly performed.

In addition, when adjusting the balance, it is possible to create an ideal relationship in which the volume variable amount of the variable resistor and the YN and Yv misconvergence correction amount are almost proportional, and the balance of the correction amount at the top and bottom of the screen can be adjusted. It also becomes easier to do.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing the main part configuration of a first embodiment of the deflection yoke device according to the present invention, and FIG. 2 is a circuit diagram showing the main part structure of the second embodiment of the deflection yoke device according to the present invention. , Figure 3 is a characteristic diagram showing the relationship between the volume rotation angle of the variable resistor and the convergence correction amount in comparison with a conventional example.
The figure is a circuit diagram of the FC coil part of a conventional deflection yoke device.
Figure 5 is a diagram of various patterns of Miss Convergence YM,
FIG. 6 is a diagram showing various patterns of misconvergence Yv. 1...first coil, 2...second coil, 3...
・Variable resistor, 4...Sliding terminal, 5.5a, 5b...
·Resistor.

Claims (1)

[Claims] An FC (F
A sliding terminal is connected between both ends of the FC coil, and a sliding terminal is connected between the first coil and the second coil to control the amount of current flowing through the first coil and the second coil. In a deflection yoke device including a variable resistor that adjusts the balance with the amount of current flowing, at least one side of both ends of the variable resistor and a sliding terminal side are connected to an FC coil via a resistor. A deflection yoke device characterized by: